Padlock



UNITED sTATEs PATENT oEEToE.

THS. SLAIGHT, OF NEWARK, NEW JERSEY.

PADLOCK.

Specficaton of Letters Patent No. 8,431, dated October 14, 1851.

To all Lo/wm @'25 may concern.'

Be it known that I, T. SLAIGHT, of Newark, in the State of New Jersey,have invented certain new and useful Improvements in Padlocks, and thatthe following is a full, clear, and exact description of the principleor character which distinguishes them from all other things before knownand of the usual manner of making, modifying, and using t-he same,reference being had to the accompanying drawing', making a part thereof.

The nature of my improved lock, is the combination of the tumblers, boltand springs, in such a way as to cause the springs to perform theiro'liices to sustain both the tumblers and bolt in place, and carry themforward when drawn back by the key in unlocking, and to throw theshackle out when unlocked, and permit it to lock again without a key,the tumblers acting as counter bolts to prevent the catch from beingthrown open by a blow, or picked, moving with the bolt to which they areattached.

The shell of this lock, and the shackle are like those of ordinarypadlocks, and may be constructed in the most approved manner. Under thestraight portion (c) of the rim of the lock, through which the end ofthe shackle passes to lock it, there is a straight .sliding bolt (CZ),moving in proper guides, and entering the recess forward in the end ofthe shackle, to receive it at right angles to the end of the shackle, asalready shown by the dotted lines, (d). At or near the center of thelength of this bolt (d), there is a stud (c) upon which the tumblers (f)are pivoted, and' projecting down from the underside of the bolt, atthis point there is a talon d yagainst which the key strikes to throwback t-he bolt. The tum` blers are curved pieces of metal, clearlyrepresented in the drawing, with a recess in their upper side, intowhichthe end of the shackle enters when locked, the ends of the tumblerscoming up in front of the end of the bolt against the side of theshackle.

There is, on the under side of these tumblers a projecting piece, thatthe key strikes, to throw the tumblers down before they are carried backby the bolt; on their forward ends there is a hook; below that, shouldthey be thrown down too far, in attempting to pick the lock, they willcatch on the U stud below, and prevent the bolt from being thrown backto unlock; at 'the rear end of each of the tumblers, and just below thepivot, there is a rest for the end of a spring (7L) which spring iscomposed of a piece of wire, descending down and coiling around a stud(2') below. These rest with their opposite ends againts the rim of thelock, at any convenient point. To unlock the bolt the key is turned,Vthe bit strikes the tumblers, throwing their front ends down, andcompressing the springs to some extent, the bit then strikes the talonon the bolt, and carries it back out of the catch of the shackle, stillfurther compressing the springs; at this point the key leaves thetumblers, which fly upward, striking the end of the shackle and throwingit out beyond the reach of the bolt. To lock the shackle it is presseddownward upon the tumblers, and carrying them down forces back the boltby striking its inclined front end till it can pass down by it intoplace, when the bolt enters its proper recess, and the tumblers beingthereby released, assume the position shown in the drawing.

Having thus fully described my improved padlock, and its mode ofoperation,- what I claim therein as new, and desire to secure by LettersPatent, is-

The arrangement of the bolt, tumblers, and springs, as herein set forth,the tumblers and bolt being operated by the same springs, which alsoserves the purpose of throwing out the shackle; the tumblers projectingbeyond the end of the bolt for that purposeall substantially as hereinsubscribed.

THOS. SLAIGHT.

fitnesses WM. GREENOUGH, J. B. VEST.

